Question

Oues 4
The numbers of boys and girls in the raito 5:7four year later the sum of their age will be 56 years. What are their present ages ? ​

Answer 1

Answer:

Let boy's age = 5x

Let girl's age = 7x

A/Q (5x+4)+(7x+4) = 56

5x+7x+8 = 56

12x = 48

x = 4

boy's age = 5x = 5x4 = 20 years

girl's age = 7x = 7x4 = 28 years

Answer 2

Question

The numbers of boys and girls in the raito 5:7four year later the sum of their age will be 56 years. What are their present ages ?

Answer

Given:-

Let the ratio be 5x and 7x

Sum of their age = 56

To find:-

Their present age = ??

According to the question,

5x + 4 + 7x + 4 = 56

12x + 8 = 56

12x = 56 - 8

12x = 48

x = 48 ÷ 12

x = 4

Girls age = 5x = 5 × 4 = 20 years

Boys age = 7x = 7 × 4 = 28 years.